AASTRA DT4x2 for BusinessPhone User Guide EN - Manual (Page 106)

Audible Adjustments
BusinessPhone – Cordless DT412/DT422/DT432 106
Ring signals
ç
Press.
The last used tab is marked. à
or
á
Select Settings . ã
Press to enter Settings .
A list with all available settings is shown. á
Select Alert signals . ã
Select Ring signals . á
Press. â
or
ã
Select the required call type.
You can change the ring signal for Internal calls, External calls, or
Callback calls. á
Press. â
or
ã
Select the required signal.
Available alternatives are;
Beep
,
Low
,
Medium
,
High
, and
Mixed
.
If you want to hear the new signal during the changing:
Play Press (see display).
The marked ring signal is played until you press
Stop
or
Select
.
Select Press to select the ring signal (see display).
The selected ring signal is shown.